Mechanical movement



. (No Model.)

W. C. BRAlMW-E'LL.

MECHANICAL MOVEMENT No. 334,341.. PatentedJan. 12,` 1886.

NA PETER-s, Phnm-Lithugmphr. wnxhingmn. D, C.

" UNITED STATES PATENT OFFICE.

WILLIAM O.`BRAMWELL, OF HYDE PARK, MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 334,341, dated January12, 1886.

Application filed December "I, 1885. Serial No. 184,928. (No model.)

To all whom ibm/wy concern:

Beit known that I, WILLIAM C. BRAMwELL, of Hyde Park, county of Norfolk,and State of Massachusetts, have invented an Improvement in MechanicalMovements, of which the following description, in connection with 'theaccompanying drawings, is a specification, like letters on the drawingrepresenting like parts.

This invention has for its object the production of a novel mechanicalmovement,whereby the extremes of the throw of one lever may be variedconstantly, while the extremes of the throw of another lever remainconstant.

My invention consists, essentially, in alever provided with a segmentalgear having wormteeth, and a lever having an attached worm in engagementwith the teeth of the said segmental gear, combined with means to rotatethe said worm to change the positions of the said levers with relationthe one to the other, whereby the uniformly-moving worm-carrying leverthrough the worm is enabled to actuate the lever having the attachedworm-toothed segment, the mechanism when employed op erating to leavethe acting end of the latter lever at each ascent a little higher up andat each descent not quite so low down as at the previous ascent anddescent of the said lever.

The drawing in side elevation and partial section shows my improvedmechanical movement.

The shaft A and the arms B B, attached to it, the latter having a seriesof wormteeth, 2, constitute the worm-toothed lever. The free end of theworm-toothed lever is shown as provided with a roller, B2, that receivesupon it the foot B3 of a rod, B, placed and guided in a suitable rail,D, in or with relation to which the said rod BL is to be reciprocatedfor uniform distances, but with constant variations in its throw-points.At one side of the worm-toothed lever, and held in place looselyv on thesaid shaft A, between the said lever and a suitable collar, is alever,E, having suitable bearings, which receive the shaft c, provided withthe worm c', and with a bevel-gear, 0"", which is engaged and rotated bya bevel-gear, c3, on the shaft o4, provided with a ratchet, 25, which isacted upon by a pawl, f, pivoted at f to some stavtact with theheart-cam.

tionary part of the frame-workAz, the said pawl acting upon one tooth ofthe rat'chetwheel at each backward movement of the lever E, suchengagement of the ratchet-wheel by the pawl intermittingly rotating thewormgear c', and causing it to turn the segmental lever in suchdirection that the long or free end of the arm B of the worm-toothedlever will at its npstroke rise gradually at each ascent a littlehigher, and at each descent will descend not quite so far, thus varyingthe high and lowpoints reached by the wormcarrying lever, andconsequently of the rod B4, in each direction of its movement, butwithout altering the length of throw of said lever or of the said rod.The lever E, carrying the worm, is moved in one direction about theshaft A as its fulcrum by the heart-cam g on a suitable rotating shaft,g, a spring, g2, as herein shown, keeping the roll or other stud, 26, atthe upper end of the said lever in con- The shaft c4 will in practicehave fastened to one end of it a handle, by which to rapidly turn it andthe wormshaftin either direction, whenever desired.

The shaft g will have upon it a pulley, as shown by dotted lines, whichwill be driven by a belt, g, driven in any usual manner.

In the drawing the rod B4 is down. The rst rotation of the cam g willcause the rod to be lifted to 2, and as the rod reaches the point 2 thepawl f will operate to effect the rotation of the worm, and so changethe relative position of the arm B and lever E that the rod will descendonly to the point 3. The next movement of the lever E in the directionof the arrow on it will raise the I'od to the point 4, a little abovethe point 2, and it will descend to the point 5, not quit-e so low downas the point 3.

Among other things this mechanism may be applied to machines forbuilding cops.

I claim- 1. The shaft A, its attached arms B B', the latter having aworm-toothed segment, and a lever mounted loosely upon the said shaftand provided with a worm in engagement with the said segment, combinedwith means to intermittingly rotate the said worm and to vibrate thelever carrying it, substantial] y as described.

IOO

2. The shaft A, the attached arms B B', the In testimony whereof I havesigned my naine Io latter having a segmental series of wormto thisspecieation in the presence of two subteeth, and a vibrating levermounted loosely soribing Witnesses. upon the said shaft and providedwith ashaft 5 having a worm, and a bevel-gear, combined VILLIAM C.BRAMWELL.

with a ratchet, and with means to move the worm-carrying lever, wherebythe worm is Witnesses: rotated one step at each throw of the lever inGEO. W. GREGORY, one direction, substantially as described. F. GUTTER.

